1. Related to the number of particles in a gram of
substance and to possible motions of the
particles (2 words)

Answers

Answer 1

Answer:

Avogadro's number or Avogardro’s constant

Explanation:

I’m pretty sure this is correct if it’s not I’m sorry lol.


Related Questions

If 12 gallons of gasoline cost $34.68, what is the unit price per gallon?

I know the subject is off can somebody who knows how to do this solve this for me?

Answers

The answer is $2.89.

Since it’s asking for the unit price of one gallon and you have the total ($34.68 and 12 gallons), you would divide $34.68 from 12, which gives you $2.89.

34.68/12 = 2.89


Based on the periodic table, which of the following groups of elements should have very different chemical properties?
OA. lithium (Li), sodium (Na), potassium (K)
OB. beryllium (Be), magnesium (Mg), calcium (Ca)
OC. helium (He), neon (Ne), argon (Ar)
OD.
potassium (K), aluminum (Al), neon (Ne)

Answers

Answer:

Explanation:

Comment

A: is in group 1. The properties are quite similar

B: the choices for answer B are in column or group 2. They too will have similar properties.

C: the choices there are in group 18. They do have similar properties.

The answer is D.

Potassium group 1aluminum group 3neon group 18

Note: group means the same thing as column. They are vertical.

differentiate between electrolytic and metallic conductors.
[tex] \\ [/tex]

ty! ~​

Answers

Explanation:

Metallic conductors contain free electron for conduction of electricity and is a good conductor of heat and electricity

electrolytic conductors contain ions for conduction

(a) Why does one side of the brain is affected when other side is damaged?

Answers

Answer:

Because the brain is connected.

Explanation:

100 Points} Name the following compounds from the structures given (images shown below)

1.

2.

3.

4.

5.

6.


Unfortunately, they're not multiple choice, so I have no possible answers to list, I believe 1. might be "2-methylhexane" but I'm unsure how to write the double bond that's shown in the structure, thanks! :)

Edit; the screenshots posted out of order, my apologies :(

Answers

Answer:

1.) There are 6 carbons in the longest possible parent chain (hex-). Since there is a double bond, this is an alkene.  The lowest possible carbon the double bond consists of is the 2nd carbon. There is also a methyl group on the 2nd carbon. All together, this makes the structure: 2-methyl-2-hexene.

2.) There are 9 carbons in the longest possible parent chain (non-). The lowest possible carbons the methyl groups are on are the 3rd and 5th carbons. The lowest possible carbon the ethyl group is located on is the 4th carbon. Remember, branches are listed alphabetically. All together, this makes the structure: 4-ethyl-3,5-dimethylnonane.

3.) There are 7 carbons in the longest possible parent chain (hept-). There is a triple bond, making this an alkyne. The lowest possible carbon the triple bond consists of is the 2nd carbon. The lowest possible carbon the methyl group is on is the 4th carbon. All together, this makes the structure: 4-methyl-2-heptyne.

4.) There are 10 carbons in the longest possible parent chain (dec-). The lowest possible carbon the propyl group is on is the 5th carbon. All together, this structure is: 5-propyldecane.

5.) There are 4 carbons in the longest possible parent chain (but-). The lowest possible carbon the methyl group is on is the 2nd carbon. All together, this makes the structure: 2-methylbutane.

6.) There are 5 carbons in the longest possible parent chain (pent-). There is a double bond, making the molecule an alkene. The lowest possible carbon the double bond consists of is the 2nd carbon. The lowest possible carbon the methyl group is on is the 2nd carbon. All together, this makes the structure: 2-methyl-2-pentene.

What is the volume of the rectangular prism shown below?

A. 250 in 3
B. 90 in 3
C. 19 in ³
D. 200 in 3

Answers

200 in^3

Volume = 4*5*10
The answer is D I believe

What happens when the density of a medium increases?

Bending of light decreases
Bending of light increases
Temperature of light increases
Temperature of light decreases

Answers

I believe it’s Refractive index

Answer:

B.

Explanation:

The amount of space between the particles in a medium reduces as its density rises, which causes light to bend. 2. This impact is highest for light that is close to the medium's surface and weakest for light that is far away from the medium's surface.

Use Charles's Law to interpret the following problem and then select the correct answer below.

A 250mL compressed tank is filled with Hydrogen gas and has a pressure of 100kPa. If all of the Hydrogen gas is removed from the tank and pumped into a 1L tank what happens to the temperature of the gas?

Question 2 options:

The temperature in the 1 L tank increases.


The temperature in the 250 mL tank decreases.


All of the above.


None of the above.


The temperature in the 250 mL tank increases.

Answers

Considering the Charles's Law, the temperature in the 1 L tank increases.

What is the Charles's Law

Charles' Law consists of the relationship that exists between the volume and the temperature of a certain amount of ideal gas, which is maintained at a constant pressure.

This law determines that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature. That is, the volume is directly proportional to the temperature of the gas.

Mathematically, Charles' law is a law that says that when the amount of gas and pressure remain constant, the ratio between volume and temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Analyzing an initial state 1 and a final state 2, the following is true:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

Temperature of the gas in this case

According to Charles' law, the volume is directly proportional to the temperature of the gas. So if the volume increases from 250 mL to 1 L, the temperature will also increase.

This is, the temperature in the 1 L tank increases.

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If another student joins the game and stands behind the two students
already in the game, how will the game be changed?

Answers

Answer:

ha djd sidi dj sjejeisns

Calculate the AH for the reaction C₂H4 (9) + H₂ (9)→ C₂H6 (g), from the following:
a. C₂H4 (g) + 3 O₂ (g) → 2 CO₂ (g) + 2 H₂O (1)
b. 2 C₂H6 (g) + 7 O₂ (g) → 4 CO₂ (g) + 6 H₂O (1)
c. 2 H₂ (g) + O₂ (g) → 2 H₂O (1)
AH = - 1411. KJ
AH = - 3120. KJ
AH = -571.6 kJ

Answers

The AH for the reaction is -137 kJ

What is Enthalpy of Formation ?

Enthalpy of formation is the energy required by reactants to convert into products . It value can be positive or negative depending on the type of reaction, Endothermic or Exothermic.

In the question 3 step reaction is given

C₂H4 (g) + 3 O₂ (g) → 2 CO₂ (g) + 2 H₂O (1)   AH = - 1411. KJ

2 C₂H6 (g) + 7 O₂ (g) → 4 CO₂ (g) + 6 H₂O (1)   AH = - 3120. KJ

2 H₂ (g) + O₂ (g) → 2 H₂O (1)     AH = -571.6 kJ

To determine the enthalpy of formation for

C₂H4 (9) + H₂ (9)→ C₂H6 (g)

Adding reaction 1 and (1/2) 3 will give

C₂H4 (g) + 7/2 O₂ (g) + H₂ (g) ----> 2 CO₂ (g) + 3H₂O AH = -1696.8

For the second reaction

We will reverse the reaction and multiply it by 1/2

2 CO₂ (g) + 3 H₂O (1) -->  C₂H6 (g) + 7/2 O₂ (g)  AH = +1560

Adding the two new reactions.

C₂H4 (9) + H₂ (9)→ C₂H6 (g)    AH = -137 kJ

Therefore The AH for the reaction is -137 kJ

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HCl + Fe + ____ + H²
Simple Way.
Hydrochloric acid + iron --> ______ + hydrogen gas.

• Answer this question, only if you know.
• Misuse of points will cost a report. ​

Answers

Answer:

This is a correct answer. 2HCL + Fe = FeCl2 + H2

Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? A. The two systems must be the same temperature.
B. The two systems must not be touching each another.
C. One system must have higher kinetic energy than the other system.
D. The thermal energy of one system must be the same as the thermal energy of the other system. ​

Answers

Answer:

c. one must have a higher kinetic energy than the other system

Which of these would a chemist most likely study?


Which type of fuel contributes the most to smog

What happens when a train comes to a stop

why a ball rolls down hill

Which animals can see in the dark

Answers

A chemist most likely study which type of fuel contributes the most to smog.

Who is a chemist?

A chemist is a scientist who majors in or studies chemistry.

A chemist studies the composition of matter, the changes that matter undergo as well as the properties and uses of matter.

Matter can undergo physical or chemical changes.

The consumption of fuels and how they affect the environment will be of interest to a chemist.

Therefore, a chemist most likely study which type of fuel contributes the most to smog.

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Substrate: N-benzoyl-L-tyrosine ethyl ester (BTEE) 0.001M
Buffer:0.1M tris-HCl, pH 7.8, containing 0.1M CaCl₂.
Enzyme:1mg/ml chymotrypsin A in 0.001M HCI.
N.B. The enzyme provided is a stock solution which should be diluted 50-fold with
0.001M HCl immediately before use.

How do I do this fold dilution calculation ?

Answers

Based on the dilution formula, 0.1 mL of the stock solution of the enzyme is required to prepare a 50-fold diluted enzyme in 0.01 M HCl.

How can 50-fold dilution of the enzyme be done?

The 50-fold dilution of the stock enzyme solution can be done by using the dilution formula to determine the given volume of the stock solution required.

The dilution formula is given below:

C1V1 = C2V2

where:

C1 = Initial concentration of enzymeC2 = Final concentration of enzymeV1 = Initial volumeV2 = Final volume

From the given data for the enzyme dilution;

C1 = 1

C2 = 1/50 = 0.02

V1 = x

V2 = 5 ml

Making V1 subject of formula in the dilution formula:

V1 = C2V2/C1

V1 =  0.02 * 5/1 = 0.1 mL

Therefore, 0.1 mL of the stock solution of the enzyme is required to prepare a 50-fold diluted enzyme in 0.01 M HCl.

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What is the mass of 15.0 ml of a liquid that has a density of 0.694 g/cm³?

Answers

Answer:

10.41 g

Explanation:

ml and   cm^3   are generally interchangeable

15 cm^3     *   . 694  g/cm^3 =  10.41 g

In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compound?

Answers

Answer:

need more info

Explanation:

i think so we need more info

Which two substances are among the six most abundant elements in living
things?
A. Potassium
B. Phosphorus
DC Sodium
D. Oxygen

Answers

Answer:

B and D

Explanation:

6 abundant elements-

1. oxygen

2. carbon

3. hydrogen

4. nitrogen

5. sulfur

6. phosphorus

Answer:

Phosphorus and Oxygen

Explanation:

Carbon is the most abundant element in our universe then comes oxygen then comes hydrogen.

Sulfur and nitrogen are also counted among most abundant elements

Option B and D are correct

a mole of pennies would fill up how many 32oz cups?

Answers

Answer:

4 cups?

Explanation:

What is the molarity of 985 mL solution with 0.81 moles KF?
M

Please help I need it done tonight

Answers

Answer:

0.82 M

Explanation:

You have been given moles and volume (in mL). To find the molarity of the solution, you need to (1) convert mL to L and then (2) plug moles and volume into the molarity formula.

985 mL / 1,000 = 0.985 L

Molarity (M) = moles / volume (L)

Molarity = 0.81 moles / 0.985 L

Molarity = 0.82 M

Name the following alkyne: CH3CH₂C = CCH₂CH₂CH3
B. 3-heptyne
D. 3-heptene
A. 4-heptyne
C. 3-heptane​

Answers

The given alkyne is Option A 3-heptyne

What is an Alkyne ?

The hydrocarbon having at least one C-C triple bond is called an Alkyne.

It has the general formula of   [tex]\rm C_n H_{2n+2}[/tex] .

In the question it is being mentioned that it is an alkyne so there will be a triple bond and not a double bond.

It has been asked in the question that

CH3CH₂C ≡  CCH₂CH₂CH3 is which alkyne from the given option.

The counting of the Carbon chain is done from the left side and the Triple bond is at the 3rd Carbon , so 3-heptyne .

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A chemist uses 22.0 mL of 0.10 M H₂SO4 to neutralize 10.0 mL of NaOH. What is the concentration of the NaOH solution?
2 A 044M
OB. 0.22 M
O C 0.11 M
OD. 0.055 M

Answers

The concentration of the NaOH solution required for the reaction given the data is 0.44 M

Balanced equation

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ (nA) = 1The mole ratio of the base, NaOH (nB) = 2

How to determine the concentration of NaOHVolume of acid, H₂SO₄ (Va) = 22 mL Concentration of acid, H₂SO₄ (Ca) = 0.1 MVolume of base, NaOH (Vb) = 10 mLConcentration of base, NaOH (Cb) =?

CaVa / CbVb = nA / nB

(0.1 × 22) / (Cb × 10) = 1 / 2

2.2 / (Cb × 10) = 1 / 2

Cross multiply

Cb × 10 = 2.2 × 2

Cb × 10 = 4.4

Divide both side by 10

Cb = 4.4 / 10

Cb = 0.44 M

Thus, the concentration of the NaOH solution is 0.44 M

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A sample of hydrogen gas occupies 92 mL at 602C. If the pressure is held constant, what volume will the gas occupy when cooled to 83C?

Answers

Answer:

 hydrogen gas will occupy 0.0374 liters when is cooled to 83 °C.

Explanation:

• T1 =602 °C = 875 K

• V1 =92 mL = 0.092 L

0.092L/875K= 1.05×10-⁴L/K

vf =nR/P T f= 1.05×10-⁴L/K ×356K

=0.0374 L

40 points!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

4.041 moles C₂H₆

Explanation:

To convert from grams to moles, you first need to determine the molar mass of C₂H₆. The molar mass is the combination of the atomic masses times the quantity of each element present in the molecule. The atomic masses usually be found on the periodic table. They represent how much the element weighs per one mole.

Carbon (C) Atomic Mass: 12.01 g/mol

Hydrogen (H) Atomic Mass: 1.008 g/mol

Molar Mass (C₂H₆): 2(12.01 g/mol) + 6(1.008 g/mol)

Molar Mass (C₂H₆): 30.068 g/mol

Now that you have the molar mass, you can multiply this ratio to the given value. Keep in mind that in order to go from grams to moles, the numerical value should be place in the denominator of the molar mass ratio. This allows for the cancellation of the unit 'grams'. The final answer should have 4 significant figures because the given value also has 4 sig figs.

121.5 grams C₂H₆              1 mole
--------------------------  x  ------------------------  =  4.041 moles C₂H₆
                                     30.068 grams

In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compound?

Answers

The molecular formula of the compound is C₄H₈O₄.

What is the molecular formula of a compound?

The molecular formula is the exact whole number ratio of the compound's elements. The empirical formula, as well as the molecular mass, are combined to generate the molecular formula.

Let's assume that the compound contains:

40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen.

The empirical formula of the compound is:

C               H           O

40.6/12    5.1/1         54.2/16

3.38          5.1           3.38

Divide by the smallest value

3.38/3.38  5.1/3.38  3.38/3.38

1                  1.5≅ 2       1

= C₁H₂O₁

The empirical formula weight = (1 × 12) + (2 × 1) + (1 × 16)

The empirical formula weight = 30 g/mol

Molecular formula = (118.084 g/mol)/30 g/mol

Molecular formula = 3.94 ≅ 4

Therefore, the molecular formula for the compound is C₄H₈O₄.

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Which is the correct name for the substance shown
in the diagram?
HH
H-C=C-H

ethanol
ethyne
ethane
ethene

Answers

Answer:  4

Explanation:

There is a double covalent bond between the carbon atoms of the hydrocarbon, so the ending must be 'ene'.

Calcium oxide + strontium hydroxide →

Answers

Answer:

Calcium oxide + strontium hydroxide → Portlandite + strontium oxide.

ie... Cao+ Sr(oH)2 = CA (oH)2+ Sro

5. What does a positively charged ion indicate in terms of its subatomic particles? Use the
Calcium ion Cat2 as a specific example in your explanation.

Answers

Answer: A positively charged ion means that there are more protons than electrons. For example, the calcium ion has 2 more protons than electrons.

what is the mass of 3.55×10−2 mol Ba

Answers

Answer:

4.87 g

Explanation:

The formula between the number of moles, mass and Mr can be used to find the mass of barium.

Number of moles = mass ÷ Mr

So, mass = number of moles × Mr

  Mr of Ba = 137.3

∴ Mass = (3.55 × 10⁻²)  × 137.3 = 4.87 g

balence this equation pleaseeee
with some steps and explanations

H₂O + 0₂ → H₂O2

thanks in advance​

Answers

Answer:

2H2O+O2-2H2O2

Explanation:

TO BALANCE equation both side should be equal

5. For the equilibrium
Br2(g) + Cl2(g)  2 BrCl(g)
At 400K, Kc=7.0. If 0.050M Br2 and 0.050 M Cl2 are introduced into a container at 400K, what will be the equilibrium concentrations of Br2, Cl2, and BrCl?

Answers

The reaction quotient of the reaction is 7.00238.

From the question.

BrCl2 is 0.004150

Br is 0.003660

Cl is 0.00067210

Q={BrCl2}/{Br}{CL2}

Q=0.004150^2/(0.0036660)(0.00067210)

Q= 7.00238

What is equilibrium?

Equilibrium of chemical reaction is the process in which the reaction remain constant and it is either moving backward or forward.

Therefore, The reaction quotient of the reaction is 7.00238

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